1 Department of Geology and Geophysics, University of Utah, Salt Lake City, UT, United States, 2 Geography Department, University of Utah, Salt Lake City, UT, United States, 3 National Snow and Ice Data Center, University of Colorado Boulder, Boulder, CO, United States, 4 Department of Geology, University of Maryland, College Park, College Park, MD, United States, 5 Institute for Marine and Atm...